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Effect Of Physiological Age On Radiation Resistance Of Some Bacteria That Are Highly Radiation Resistant, Lewis Keller, R. Burt Maxcy
Effect Of Physiological Age On Radiation Resistance Of Some Bacteria That Are Highly Radiation Resistant, Lewis Keller, R. Burt Maxcy
Department of Food Science and Technology: Faculty Publications
Physiological age-dependent variation in radiation resistance was studied for three bacteria that are highly radiation resistant: Micrococcus radiodurans, Micrococcus sp. isolate C-3, and Moraxella sp. isolate 4. Stationary-phase cultures of M. radiodurans and isolate C-3 were much more resistant to gamma radiation than were log-phase cultures. This pattern of relative resistance was reversed for isolate 4. Resistance of isolate 4 to UV light was also greater during log phase, although heat resistance and NaCl tolerance after heat stress were greater during stationary phase. Radiation-induced injury of isolate 4 compared with injury of Escherichia coli B suggested that the injury process, …